Korean Ash – Fraxinus chinensis

Korean Ash
Fraxinus chinensis
var. rhynchophylla
Family Oleaceae – Olive, Ash, Lilac and Privet

Also commonly called Chinese Ash.

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Korean Ash
Korean ash is native to ASIA-TEMPERATE
Russian Far East: Russian Federation – Primorye, Sakhalin; China; Eastern Asia: Korea; ASIA-TROPICAL: Indo-China: Vietnam [1]

Leaflets 3-7, terminal leaflet broadly ovate to elliptic, sometimes ± lanceolate, (4-)5-9(-12) × (2.5-)3.5-5(-7) cm, villous to tomentose beside basal part of midrib abaxially, sometimes brownish, margin crenate-serrate, apex short acuminate to acuminate or caudate; primary veins (5 or)6-9 on each side of midrib. Samara narrowly to very narrowly spatulate, 2.5-4 cm × 4.5-7 mm. Fl. Apr-May, fr. Sep-Oct.

Grows on slopes, along rivers, roadsides; 0-1500 m. Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Shaanxi, Shandong, Shanxi [Japan, Korea, Russia]. The wood is used for cabinet making." — Flora of China [2]

Korean Ash bark & foliage

Ash trees in the American midwest are rapidly falling victim to the emerald ash borer beetle invasion, first detected in the early 1990s. Millions of trees have been destroyed in the Chicago suburbs and other widespread locations in an effort to stem the tide. However, the beetle is spreading and it appears little can be done to prevent it from broadening its range.

I lost the single biggest plant on my property in 2007, a huge ash tree that shaded the front of my house. I wish the developers had known then what we know now and planted a hardier variety of tree.

Korean Ash Tree
This 57-year-old Korean ash at the Morton Arboretum has so far escaped damage by EAB.


  1. USDA, ARS, – (GRIN) (20 February 2011), "Genus: Fraxinus L."
  2. www.efloras.org, Flora of China, "F. chinensis var. rhynchophylla"
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Family Oleaceae – Olive, Ash, Lilac and Privet
The olive family contains 25 genera and over 500 species of flowering plants. Most species are native to temperate and tropical regions of the Northern Hemisphere. The best known of this family are olive, ash, privet, lilac, and Forsythia.
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